Performance Modeling and Analysis of the LAA Category-4 LBT Procedure
Performance Modeling and Analysis of the LAA Category-4 LBT Procedure
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LAA 4 类 LBT 程序的性能建模和分析
DOI：
10.1109/tvt.2019.2933012
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发表时间：
2019-08
影响因子：
6.8
通讯作者：
Qilei Ren
中科院分区：
文献类型：
--
作者：
Jie Xiao;Jun Zheng;Liangyu Chu;Qilei Ren
本文研究了用于未授权频谱带中的下行链路数据传输的LTE LAA类别4先听后说（LBT）过程的建模，并且基于建模分析了LTE LAA类别4 LBT过程的性能。首先开发了一个3-D马尔可夫模型来描述LAA eNodeB的第4类LBT过程。3-D马尔可夫模型考虑了第4类LBT过程中差距周期和传输优先级，这在LTE LAA LBT过程的所有现有模型中都没有考虑。基于3-D马尔可夫模型，性能模型推导出分析的稳态传输概率，归一化吞吐量和平均接入延迟的LAA eNodeB，分别。推导的性能模型是合理的，通过仿真结果。通过数值计算分析差距周期和传输优先级对系统性能的影响。
This paper studies the modeling of an LTE LAA category-4 listen before talk (LBT) procedure for downlink data transmission in an unlicensed spectrum band, and analyzes the performance of the LTE LAA category-4 LBT procedure based on the modeling. A 3-D Markov model is first developed to describe the category-4 LBT procedure of an LAA eNodeB. The 3-D Markov model takes into account the GAP period and transmission priority in the category-4 LBT procedure, which are not considered in all existing models for LTE LAA LBT procedures. Based on the 3-D Markov model, a performance model is derived for analyzing the steady-state transmission probability, normalized throughput, and mean access delay of an LAA eNodeB, respectively. The derived performance models are justified through simulation results. The impacts of the GAP period and transmission priority on the system performance are investigated through numerical results, respectively.
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